The individual or group behind the $82 million hack of the cross-chain bridge Orbit Chain moved approximately $48 million through Tornado Cash (CRYPTO:TORN) after months of inactivity, as reported by Arkham Intelligence.

The exploit, which took place in the final hours of 2023, saw $81.5 million drained from Orbit Chain.

The stolen funds remained untouched until the recent transfer to the Ethereum-based (CRYPTO:ETH) crypto mixer.

Orbit Chain, which has resumed some services post-exploit, announced that it is collaborating with authorities to track and recover the assets.

The hacker still controls about $71 million in ether and DAI stablecoins, due to the assets' appreciation since the attack.